WOCONN-1D4 USB extension will extend a standard USB 2.0 cable with a type-A connector. USB 2.0 cables are backwards compatible as they can carry a USB 1.0 and 1.1 signal. USB cables are used to connect devices such as digital cameras, digital video cameras, scanners, printers, web cams, mice, keyboards, joysticks, network connections, etc. The maximum length for a single USB cable is 15ft. To get more than 15 ft you will need to boost the signal with a repeater Cable (Part # UC-50200) or Hub.